Duranta in Michigan

Michigan: I bought a Duranta in the shape of a small tree last year. I read that I could take it indoors and treat it as a houseplant until spring. I pruned it back as directed. It worked: it is now June 27 nd it is in full leaf, bright fresh green all over it. I've put it outside. But I want to know when I can expect it to flower. As of now there is no sign that it is getting any kind of flower buds at all. Should I just wait or is there something I should me doing? I have used a liquid fertilizer.
Also, it seems to be root-bound. Will that affect the flowering, and should I get a bigger put?
Thanks, James